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A female animal with genotype A/a; B/b is crossed with a double
recessive male a/a; b/b. Their progeny include:
452 A/a; B/b
459 a/a; b/b
72 A/a; b/b
67 a/a; B/b
How many map units apart are loci A and B?
A female animal with genotype A/a; B/b is crossed with a double recessive male a/a; b/b....
12. A female critter with genotype AaBb is crossed with a double-recessive male (aabb). The progeny included 54 individuals that were AaBb, 58 aabb, 462 Aabb, and 476 aaBb. Explain the layout of alleles on the female parent. Can you calculate a map distance (if you can what is it)?
"Ebony body, held-out wings and sepia eyes are ALL RECESSIVE AND ALL ON CHROMOSOME 3. The COEFFICIENT of COINCIDENCE for chromosome 3 is 0.5. A homozygous ebony male is mated to a homozygous held out wing and sepia eyed female. The F1 are wild-type. An F1 female is test crossed to a fly that is homozygous for all three recessive alleles and they produce 1000 progeny. If ebony and held-out are separated by 12 map units, and held-out and sepia...
Genetics Question: A tree of genotype BBCC is crossed to a tree of genotype bbcc. The resulting F1 trees are testcrossed. A) What % of the testcross progeny will be bbcc if the 2 genes are 0 map units apart? Provide reason B) What % of the testcross progeny will be bbcc if the 2 genes are on the wame chromosome and 60 map units apart? provide reason
9. A male rabbit with the genotype GaBb is crossed with a female rabbit with the genotype GgBb. The square is set up below. Fill it out and determine the phenotypes and proportions in the offspring Gb GB gB. gb Gb How many out of 16 are: GB Grey, red eyed: Grey, black eyed: White, red eyed: White, black eyed: gB gb
Genes A and B are 5 units apart. A doubly heterozygous female and a homozygous recessive male are crossed. Of ten thousand offspring, how many recombinant offspring would be produced? A. 2500 B. 250 C. 50 D. 500 E. 5
A dark purple eggplant (male) was crossed with a white eggplant (female). The resulting F1 were all violet (light purple), while the F2 included mostly violet, and some dark purple and white eggplants. Answer the following below. (5 pts.) Type of dominance Male genotype Female genotype F1 progeny cross Phenotype Genotype F2 progeny cross Phenotype Genotype
Question 3. From text book Male Drosophila expressing the autosomal recessive mutations sc (scute), ec (echinus), cv (crossveinless) and b (black) were crossed to phenotypically wild- type females, and the 3288 progeny listed were obtained. (Only mutant traits are noted.) 653 black, scute, echinus, crossveinless 670 scute, echinus, crossveinless 675 ild type 655 black 71 black, scute 73 scute 73 black, echinus, crossveinless 74 echinus, crossveinless 87 black, scute, echinus 84 scute, echinus 86 black, crossveinless 83 crossveinless 1 lack,...
717 pts). In Drosophila, two recessive mutations delta vein (d) and rough eye (r) both map to chromosome 3 and are known to be 20 m.u. apart. Another recessive mutation, garnet eye color (a) has been mapped to the X chromosome. A delta veined, rough and garnet eyed- female was crossed to a wild-type male. The resulting fī females are testcrossed to delta-veined, rough and, garnet-eyed males. dng larg & ORG/ A. (6pts) Write the genotype of the Fı female...
Eyeless is a recessive gene (ey) on the fourth chromosome of Drosophila. A male trisomic for chromosome 4 with the genotype +eyey is crossed to a disomic eyeless female of the genotype +ey. What is the phenotypic ratio expected among the progeny? a. 3 wildtype : 1 eyeless b. 4 wildtype : 1 eyeless c. 5 wildtype : 1 eyeless d. 1 wildtype : 1 eyeless e. 2 wildtype : 1 eyeless
Questions 34 to 41 deal with linkage and mapping: see Sanders & Bowman 2015/2018 - Chapter 5. 34. Two true-breeding Drosophila were crossed: a normal-winged, normal-bodied female and a curved-winged, speck-bodied male. The F, all have normal wings and normal bodies. Female F1 offspring were then crossed with curved-winged, speck- bodied male flies. The following offspring of that cross were counted: 174 normal wings, normal body (Neither the allele for curved wings nor 169 curved wings, speck body that for...